On shear-generated gravity waves that reach the mesosphere. Part II: Wave propagation

Oliver Buhler, Michael E. McIntyre

Research output: Contribution to journalArticle

Abstract

The propagation of Kelvin-Helmholtz (KH) shear-generated gravity waves through the summer stratosphere is investigated using ray tracing, taking into account back-reflection as well as wave dissipation due to precritical-layer breaking, radiative damping, and viscous diffusion. It is found that the transmission rate of upward-eastward waves to the mesosphere is surprisingly good, provided that the horizontal scale of the waves is large enough to prevent back-reflection. A rough upper bound on the net momentum flux into the mesosphere due to a large ensemble of mutually incoherent KH-generated clear-air turbulence events is then estimated, using reasonable-looking assumptions about the statistics of such events. It is found that on this basis the wave source cannot safely be neglected in the global angular momentum budget.

Original languageEnglish (US)
Pages (from-to)3764-3773
Number of pages10
JournalJournal of the Atmospheric Sciences
Volume56
Issue number21
StatePublished - Nov 1 1999

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mesosphere
gravity wave
wave propagation
wave reflection
ray tracing
angular momentum
damping
stratosphere
dissipation
momentum
turbulence
air
summer

ASJC Scopus subject areas

  • Atmospheric Science

Cite this

On shear-generated gravity waves that reach the mesosphere. Part II : Wave propagation. / Buhler, Oliver; McIntyre, Michael E.

In: Journal of the Atmospheric Sciences, Vol. 56, No. 21, 01.11.1999, p. 3764-3773.

Research output: Contribution to journalArticle

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